I am chinese and live in china.I purchased it from cowboom without contract when I travelled in us. The price is $405 and it is brand new.When I activated it with chinese cdma sim,it showed invaild sim card！I contacted apple immediately,they told me it support cdma and gsm,but is gsm unlocked and cdma locked.If I need do cdma unlocked,I need contact att to help me unlock!
Can you help me unlock cdma?